Plate for printing upon tin and the like



March 22, 1927.

J. PICKETT P LATE FOR PRINTING UPON TIN AND THE LIKE Filed Feb. 16, 1926 ,0 I 3} album ics.

MICHAEL J. EICKE'I'T,

OF CLEVELAND, OI-IIO.

PLATE FOR PRINTING UPON TIN AND THE LIKE.

Application filed February 1(3, 1926. Serial No. 88,559.

This invention relates to improvements in the plates carrying the design to be printed and adapted to be fixed to the plate-cylinder of a printing press such as employed for printing upon sheets of tin by the dry lithograph process.

The main object of the invention is to provide a plate adapted to be fixed to the plate-cylinder of a printing press, which will produce clean out and sharp edges upon sheets of tin where the design printed thereon begins and ends so as to leave clean marginal strips for the application of solder to the overlapping edges in making cans.

In order that the invention may be clearly understood the same will be hereinafter fully described with reference to the accompanying drawings, and the novel features thereof will be distinctly pointed out in the appended claims.

In the drawings similar characters of reference indicate corresponding parts.

Figure 1- is a side elevation of a plate constructed in accordance with my lnven- 25 tion and applied to the plate-cylinder of a printing press, v

Fig. 2 illustrates the various cylmders as arranged in a printing press of the character mentioned,

Fig. 3 illustrates, on an enlarged scale, a fragment of the plate attached to the plate-cylinder,

Fig. 4 is a perspective view of a fragmental portion of the plate, and L Fig. 5 is a plan view of a sheet of tin after the design has been printed thereon.

Referring to the drawings. 1 represents the ink-cylinder, 2 the plate-cylinder, 3 the transfer-blanket-cylinder with the blanket 4t secured thereto in any suitable manner, and

5 the impression-cylinder. A feed tableis provided at 6 and a delivery board at 7 all of which parts are supported in a suitable frame and are found in the ordinary printing press of the character mentioned.

In printing upon sheets of tin which are used in the making of cans and therefore make it necessary to leave clean marginal surfaces for the overlapping joints in order to permit soldering thereof, the beginning and end edges of the design are often uneven and ragged due to the spreading of the ink. The purpose of this invention is to provide means for insuring the printing of the design with sharp and clean-cut surrounding edges. This is accomplished by so constructing the plate to be attached to the plate-cylinder that when it is attached the inking surface thereof terminates on all sides in Lip-standing sharp edges, and by breaking up the large inking surface and providing the same with longitudinal and transverse grooves for serving as depressions or pockets for receiving the surplus ink squeezed out by the pressure between: the plate-cylinder 2 and transfer-blanket-cylinder 3. Said plate is indicated by 8, and is preferably constructed of steel in a semicvlindrical form to conform to the cylinder 2, to which it is to be attached. This plate is out down at its upper and lower longitudinal edges as at 9 and at its side edges as at 10, and thereby leaving an ink receiving surface 11 surrounded by sharp upstanding edges at 12 and 13 respectively. Longitudinal grooves 14: and transverse grooves 15 intersecting each other are cut into the ink receiving surface 11' and extend from edge to edge thereof. These grooves break up the large inking surface and serve as depressions or pockets for receiving the surplus ink. The cutting down of the plate 8 at 9 and 10 not only leaves upstanding sharp edges but also provides flanges. which i are provided with openings at 16 at suitable intervals for receiving headed screws 17 for securing said plate to the cylinder 2 as indicated at 18. The openings 16 are countersunk as at 19 for permitting the head of the screw 17 to enter below the outer surface of said flanges.

From the drawings and description it will be seen that by constructing the plate with sharp rip-standing surrounding edges and by breaking up the ink receiving surface into smaller surfaces. and providing longitudinal and transverse grooves in the plate to serve as depressions or pockets for receiving the surplus ink squeezed out by the pressure between the plate-cylinder 2 and the transferblanket-cylinder 3., that this insures sharpout even edges surrounding the design printed on sheets of tin. In other words. constructing the plate in accordance with this invention. prevents the spreading of the surplus ink beyond the edges of the desi upon the plate, therefore transferring the design to the blanket with clean and sharp-cut edges and then finally printing the design from the blanket to the sheet of tin, such as indicated by 20, leaving the same clean at 21 and 22 and sharp-cut edges around the design at 23 and 24, and therefore riear and clean strips of tin outside of the design for overlapping and soldering in the making of cans.

Having fully what I claim is:

1. Plates for attachment to the plate-cylinder of a printing press, consisting of a metallic plate having a raised ink receiving surface, and the ink receiving surface being described my invention,

7 provided with longitudinal grooves extending to the edges thereof.

2. Plates for attachment to the plate-cylinder of a printing press, consisting of a metallic plate having an ink receiving surface, the ink receiving surface'being raised and provided with longitudinal grooves extending to the edges thereof, and the ink receiving surface being provided with transverse grooves extending to the edges thereof.

Plates for attachment to the plate-cylinder of a printing press, consisting of a metallic plate, the plate being made cylindrical in form, the plate being cut down at its edges to leave an ink receiving surface having tip-standing sharp edges surrounding the ink receiving surface, the ink receiving surface of the plate being provided with longitudinal groovesextending from edge to edge thereof, and the ink receiving surface of the plate being provided with transverse grooves intersecting said longitudinal grooves and extending from edge to edge of the ink receiving surface- In testimony WhereofI aflix my signature.

MICHAEL J. PIOKETT. 

